diff --git a/CHANGELOG.md b/CHANGELOG.md
index a319ffe505..a464537073 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,7 +4,7 @@ Nokogiri follows [Semantic Versioning](https://semver.org/), please see the [REA
 
 ---
 
-## next / unreleased
+## 1.15.4 / 2023-08-11
 
 ### Dependencies
 
diff --git a/lib/nokogiri/version/constant.rb b/lib/nokogiri/version/constant.rb
index a22051c501..fd2fa16f68 100644
--- a/lib/nokogiri/version/constant.rb
+++ b/lib/nokogiri/version/constant.rb
@@ -2,5 +2,5 @@
 
 module Nokogiri
   # The version of Nokogiri you are using
-  VERSION = "1.15.3"
+  VERSION = "1.15.4"
 end